Brazo de Mercedez
Ingredients

2 can of condensed milk.
1 teaspoon of vanilla.
1/2 cream of tartar
2 ½ cups of cake flour.
½ cup of confectioner sugar.
1 cup of sugar.
8 eggs.
Oil.

Procedures:
Beat egg whites and cream of tartar until soft peaks are formed. Gradually add sugar beating continuously until stiff peaks are formed. Pour in a lined pan heavily greased and bake when done invert in cheesecloth with confectioner sugar.

FILLING
Combine egg yolk, condensed milk, vanilla. Cool into very low heat or in double broiler until it thickens.

Remove from fire, apply the filling into baked products. Roll as in jelly roll.

updated recipe here Brazo de Mercedez 2